media: rcar-vin: Brush endpoint properties

index e25ab07..39c4e6a 100644
@@ -39,9 +39,11 @@ Additionally, an alias named vinX will need to be created to specify
 which video input device this is.
 
 The per-board settings Gen2 platforms:
- - port sub-node describing a single endpoint connected to the vin
-   as described in video-interfaces.txt[1]. Only the first one will
-   be considered as each vin interface has one input port.
+
+- port - sub-node describing a single endpoint connected to the VIN
+  from external SoC pins as described in video-interfaces.txt[1].
+  Only the first one will be considered as each vin interface has one
+  input port.
 
 The per-board settings Gen3 platforms:
 

@@ -52,7 +54,7 @@ from local SoC CSI-2 receivers (port at 1) depending on SoC.
 - renesas,id - ID number of the VIN, VINx in the documentation.
 - ports
     - port at 0 - sub-node describing a single endpoint connected to the VIN
-      from external SoC pins described in video-interfaces.txt[1].
+      from external SoC pins as described in video-interfaces.txt[1].
       Describing more than one endpoint in port at 0 is invalid. Only VIN
       instances that are connected to external pins should have port at 0.
     - port at 1 - sub-nodes describing one or more endpoints connected to

index 39c4e6a..b410863 100644
@@ -45,6 +45,17 @@ The per-board settings Gen2 platforms:
   Only the first one will be considered as each vin interface has one
   input port.
 
+  - Optional properties for endpoint nodes:
+    - hsync-active: see [1] for description. Default is active high.
+    - vsync-active: see [1] for description. Default is active high.
+      If both HSYNC and VSYNC polarities are not specified, embedded
+      synchronization is selected.
+    - field-active-even: see [1] for description. Default is active high.
+    - bus-width: see [1] for description. The selected bus width depends on
+      the SoC type and selected input image format.
+      Valid values are: 8, 10, 12, 16, 24 and 32.
+    - data-shift: see [1] for description. Valid values are 0 and 8.
+
 The per-board settings Gen3 platforms:
 
 Gen3 platforms can support both a single connected parallel input source

@@ -57,6 +68,10 @@ from local SoC CSI-2 receivers (port at 1) depending on SoC.
       from external SoC pins as described in video-interfaces.txt[1].
       Describing more than one endpoint in port at 0 is invalid. Only VIN
       instances that are connected to external pins should have port at 0.
+
+      Endpoint nodes of port at 0 support the optional properties listed in
+      the Gen2 per-board settings description.
+
     - port at 1 - sub-nodes describing one or more endpoints connected to
       the VIN from local SoC CSI-2 receivers. The endpoint numbers must
       use the following schema.

@@ -66,6 +81,8 @@ from local SoC CSI-2 receivers (port at 1) depending on SoC.
         - endpoint at 2 - sub-node describing the endpoint connected to CSI40
         - endpoint at 3 - sub-node describing the endpoint connected to CSI41
 
+      Endpoint nodes of port at 1 do not support any optional endpoint property.
+
 Device node example for Gen2 platforms
 --------------------------------------
 

index 52b7c7b..baf9d97 100644
@@ -113,6 +113,8 @@ Optional endpoint properties
   Note, that if HSYNC and VSYNC polarities are not specified, embedded
   synchronization may be required, where supported.
 - data-active: similar to HSYNC and VSYNC, specifies data line polarity.
+- data-enable-active: similar to HSYNC and VSYNC, specifies the data enable
+  signal polarity.
 - field-even-active: field signal level during the even field data transmission.
 - pclk-sample: sample data on rising (1) or falling (0) edge of the pixel clock
   signal.

index b410863..2f42005 100644
@@ -55,6 +55,8 @@ The per-board settings Gen2 platforms:
       the SoC type and selected input image format.
       Valid values are: 8, 10, 12, 16, 24 and 32.
     - data-shift: see [1] for description. Valid values are 0 and 8.
+    - data-enable-active: polarity of CLKENB signal, see [1] for
+      description. Default is active high.
 
 The per-board settings Gen3 platforms:
 

index 092610e..250f698 100644
@@ -888,8 +888,6 @@
 			bus-width = <24>;
 			hsync-active = <0>;
 			vsync-active = <0>;
-			pclk-sample = <1>;
-			data-active = <1>;
 		};
 	};
 };

index 8ab793d..1becb79 100644
@@ -860,8 +860,6 @@
 			bus-width = <24>;
 			hsync-active = <0>;
 			vsync-active = <0>;
-			pclk-sample = <1>;
-			data-active = <1>;
 		};
 	};
 };

index aa209f6..f57a7ae 100644
@@ -768,8 +768,6 @@
 			bus-width = <24>;
 			hsync-active = <0>;
 			vsync-active = <0>;
-			pclk-sample = <1>;
-			data-active = <1>;
 		};
 	};
 };